When Galaxies Collide

Humanity comes into contact with an alien life form that is very technologically advanced. Will a technologically advanced alien race be benign toward a less developed race? Is their agenda as transparent as their words may lead one to believe?
The United States had developed a inter-dimensional gateway to a planet within the Gemini system. But an accident caused by an alien work party disrupts the gateway. In the course of the investigations, they learn that the Jenni have an unspoken wish to colonize one of the planets in the solar system, but the true reason is a secret.